HI all!<br><br>Pls answer my 2 simple questions...<br><br>Thanks in advance....

At a distance of 0.208 cm from the center of a charged conducting sphere with radius 0.100cm, the electric field is 485 n/c . wh

Anna35 [415]

We have the equation for electric field E = kQ/ $d^{2}$

Where k is a constant, Q is the charge of source and d is the distance from center.

In this case E is inversely proportional to $d^{2}$

So, $\frac{E_{1} }{E_{2}} = \frac{d_{2}^{2}}{d_{1}^{2}}$

$E_{1}$ = 485 N/C

$d_{1}$ = 0.208 cm

$d_{2}$ = 0.620 cm

$E_{2}$ = ?

$\frac{485 }{E_{2}} = \frac{0.620^{2}}{0.208^{2}}$

$E_{2}$ = $\frac{485*0.208^{2}}{0.628^{2}}$

$E_{2}$ = 53.20 N/C

7 0

4 years ago

Read 2 more answers

A stationary 6-kg shell explodes into three pieces. One 4.0 kg piece moves horizontally along the negative x-axis. The other two

natta225 [31]

Answer:

-15 m/s

Explanation:

The computation of the velocity of the 4.0 kg fragment is shown below:

For this question, we use the correlation of the momentum along with horizontal x axis

Given that

Weight of stationary shell = 6 kg

Other two fragments each = 1.0 kg

Angle = 60

Speed = 60 m/s

Based on the above information, the velocity = v is

$1\times 60 \times cos\ 60 + 1\times 60 \times cos\ 60 - 4\ v = 0$

$\frac{60}{2} + \frac{60}{2} - 4\ v = 0$

$v = \frac{60}{4}$

= -15 m/s

4 0

3 years ago

A book is lying on a table. If its mass is 15 kg, what would its net force be?

atroni [7]

What you really want to know is:

What is the net force ACTING ON the book ?

The answer is:

Before you ask how much net force there is, you should decide if there IS any net force.

-- If there's any net force acting on the object, then the object is accelerating.

-- If the object is not accelerating, then there is no net force acting on it.

-- The book is just laying there on the table. It is not accelerating. So there is definitely NO net force acting on it.

5 0

3 years ago

According to Newton’s first law of motion, what must happen to move an object at rest? It must move by its own inertia. It must

Nesterboy [21]

I think it is a force must act on it.

6 0

3 years ago

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You place three nonflammable objects in a fire. They are identical in shape and size, but one object is black, the second is whi

Nookie1986 [14]

Answer:

The first object (black)

Explanation:

The thermal radiation of a body is governed by the Stefan Boltzmann Law, which is mathematically given as:

$E=\epsilon. \sigma.T^4$

where:

$\sigma =5.67\times 10^{-8}\ W.m^{-2}.K^{-4}$ (Stefan Boltzmann constant)

Also the absorptivity and emissivity of a perfectly black body is maximum ( =1 ) therefore it absorbs all the heat energy incident on it and glows the brightest due to the perfect emission.

So here also the black object will glow brighter than the others.

5 0

3 years ago

HI all!Pls answer my 2 simple questions...Thanks in advance....